upgrade in prep for PC 4.4.0
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README.md
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21
README.md
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@ -0,0 +1,21 @@
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# Prusa Connect Prometheus Exporter
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Version v0.1.0 of this exporter supports the pre-4.4.0 changes to the Prusa Connect API (non-API-key version).
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Current master branch supports the new, 4.4.0-beta2 release of Prusa Connect as well as the older API.
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## Usage
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`./prusa-connect-exporter -h`
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* `apikey`
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Prusa Connect API key (see Main Menu -> Settings -> Network on the printer).
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If no key is provided, exporter assumes the older API layout when querying the printer.
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* `hostname`
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Hostname the Prusa Connect API is available at (assumes http) (default "localhost")
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* `interval`
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How often, in seconds, to query the API (default 2)
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* `path`
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Local path to export metrics on (default "metrics")
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* `port`
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Local port to export metrics on (default "2112")
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275
main.go
275
main.go
@ -15,7 +15,8 @@ import (
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"github.com/prometheus/client_golang/prometheus/promhttp"
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)
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type Metrics struct {
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// original /api/telemetry type struct
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type MetricsV1 struct {
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TempNozzle int `json:"temp_nozzle"`
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TempBed int `json:"temp_bed"`
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Material string `json:"material"`
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@ -29,68 +30,135 @@ type Metrics struct {
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ProjectName string `json:"project_name"`
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}
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// new 4.4.0+ /api/printer struct
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type MetricsV2 struct {
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Telemetry Telemetry `json:"telemetry"`
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Temperature Temperature `json:"temperature"`
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State State `json:"state"`
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}
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type Telemetry struct {
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TempBed float64 `json:"temp-bed"`
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TempNozzle float64 `json:"temp-nozzle"`
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PrintSpeed int `json:"print-speed"`
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ZHeight float64 `json:"z-height"`
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Material string `json:"material"`
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}
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type Temperature struct {
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Tool0 Tempatures `json:"tool0"`
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Bed Tempatures `json:"bed"`
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}
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type Tempatures struct {
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Actual float64 `json:"actual"`
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Target float64 `json:"target"`
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Display float64 `json:"display"`
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Offset float64 `json:"offset"`
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}
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type State struct {
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Text string `json:"text"`
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Flags Flags `json:"flags"`
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}
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type Flags struct {
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Operational bool `json:"operational"`
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Paused bool `json:"paused"`
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Printing bool `json:"printing"`
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Cancelling bool `json:"cancelling"`
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Pausing bool `json:"pausing"`
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SdReady bool `json:"sdReady"`
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Error bool `json:"error"`
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ClosedOnError bool `json:"closedOnError"`
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Ready bool `json:"ready"`
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Busy bool `json:"busy"`
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}
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// /api/job struct
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type JobV2 struct {
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State string `json:"state"`
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Job Job `json:"job"`
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Progress Progress `json:"progress"`
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}
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type File struct {
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Name string `json:"name"`
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Path string `json:"path"`
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Display string `json:"display"`
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}
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type Job struct {
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EstimatedPrintTime int `json:"estimatedPrintTime"`
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File File `json:"file"`
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}
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type Progress struct {
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Completion float64 `json:"completion"`
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PrintTime int `json:"printTime"`
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PrintTimeLeft int `json:"printTimeLeft"`
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}
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type Config struct {
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QueryHostname string
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QueryInterval int
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Port string
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Path string
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APIKey string
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}
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var (
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opsFlowFactor = prometheus.NewGauge(prometheus.GaugeOpts{
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errCount = 0
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gauges = map[string]prometheus.Gauge{
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"flow_factor": prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "prusa_connect",
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Name: "flow_factor",
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Help: "Current flow factor, as a unitless number",
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})
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opsPrintSpeed = prometheus.NewGauge(prometheus.GaugeOpts{
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}),
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"printing_speed": prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "prusa_connect",
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Name: "printing_speed",
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Help: "Current print speed, as a percentage",
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})
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opsZPosition = prometheus.NewGauge(prometheus.GaugeOpts{
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}),
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"z_position": prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "prusa_connect",
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Name: "z_position",
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Help: "Vertical depth, in mm, of the Z head",
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})
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opsBed = prometheus.NewGauge(prometheus.GaugeOpts{
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}),
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"temp_bed": prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "prusa_connect",
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Name: "temp_bed",
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Help: "Temperature, in celsius, of the print bed",
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})
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opsNozzle = prometheus.NewGauge(prometheus.GaugeOpts{
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}),
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"temp_nozzle": prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "prusa_connect",
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Name: "temp_nozzle",
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Help: "Temperature, in celsius, of the print nozzle",
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})
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opsProgress = prometheus.NewGauge(prometheus.GaugeOpts{
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}),
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"progress": prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "prusa_connect",
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Name: "progress",
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Help: "Current print completeness, as a percentage",
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})
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opsDuration = prometheus.NewGauge(prometheus.GaugeOpts{
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}),
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"duration": prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "prusa_connect",
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Name: "duration",
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Help: "Duration of current print job, as seconds since start",
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})
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opsRemaining = prometheus.NewGauge(prometheus.GaugeOpts{
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}),
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"remaining": prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "prusa_connect",
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Name: "remaining",
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Help: "Estimated remaining time of current print job, as seconds",
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})
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errCount = 0
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}),
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}
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)
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func errLog(err error) {
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errCount++
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// reset metrics
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opsFlowFactor.Set(0)
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opsPrintSpeed.Set(0)
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opsZPosition.Set(0)
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opsBed.Set(0)
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opsNozzle.Set(0)
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opsProgress.Set(0)
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opsDuration.Set(0)
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opsRemaining.Set(0)
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for _, g := range gauges {
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g.Set(0)
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}
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if errCount == 5 {
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log.Printf("suppressing further error logging")
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return
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@ -109,42 +177,124 @@ func recordMetrics(ctx context.Context, config Config) {
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return
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default:
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time.Sleep(time.Second * time.Duration(config.QueryInterval))
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res, err := http.Get(config.QueryHostname + "/api/telemetry")
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if err != nil {
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errLog(err)
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if config.APIKey == "" {
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parseMetricsV1(ctx, config)
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break
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}
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b, err := io.ReadAll(res.Body)
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if err != nil {
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errLog(err)
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break
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}
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t := &Metrics{}
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err = json.Unmarshal(b, t)
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if err != nil {
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errLog(err)
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break
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}
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if errCount != 0 {
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log.Printf("connection established")
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}
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errCount = 0
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opsFlowFactor.Set(float64(t.FlowFactor))
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opsPrintSpeed.Set(float64(t.PrintingSpeed))
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opsZPosition.Set(t.ZPosition)
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opsBed.Set(float64(t.TempBed))
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opsNozzle.Set(float64(t.TempNozzle))
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opsProgress.Set(float64(t.Progress))
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opsDuration.Set(float64(parseDuration(t.PrintDur) / time.Second))
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estimatedTimeRemaining, err := strconv.ParseFloat(t.TimeEst, 64)
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if err == nil {
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opsRemaining.Set(float64(estimatedTimeRemaining))
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}
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parseMetricsV2(ctx, config)
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}
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}
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}()
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}
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func parseMetricsV1(ctx context.Context, config Config) {
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t, err := getTelemetry(config.QueryHostname)
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if err != nil {
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errLog(err)
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return
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}
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if errCount != 0 {
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errCount = 0
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log.Printf("connection established")
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}
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gauges["flow_factor"].Set(float64(t.FlowFactor))
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gauges["printing_speed"].Set(float64(t.PrintingSpeed))
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gauges["z_position"].Set(t.ZPosition)
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gauges["temp_bed"].Set(float64(t.TempBed))
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gauges["temp_nozzle"].Set(float64(t.TempNozzle))
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gauges["progress"].Set(float64(t.Progress))
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gauges["duration"].Set(float64(parseDuration(t.PrintDur) / time.Second))
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estimatedTimeRemaining, err := strconv.ParseFloat(t.TimeEst, 64)
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if err == nil {
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gauges["remaining"].Set(float64(estimatedTimeRemaining))
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}
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}
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func parseMetricsV2(ctx context.Context, config Config) {
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t, err := getPrinter(config.Port, config.APIKey)
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if err != nil {
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errLog(err)
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return
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}
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j, err := getJob(config.Port, config.APIKey)
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if err != nil {
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errLog(err)
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return
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}
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if errCount != 0 {
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errCount = 0
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log.Printf("connection established")
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}
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gauges["printing_speed"].Set(float64(t.Telemetry.PrintSpeed))
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gauges["z_position"].Set(t.Telemetry.ZHeight)
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gauges["temp_bed"].Set(float64(t.Telemetry.TempBed))
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gauges["temp_nozzle"].Set(float64(t.Telemetry.TempNozzle))
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gauges["progress"].Set(float64(j.Progress.Completion) * 100)
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gauges["duration"].Set(float64(j.Progress.PrintTime))
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gauges["remaining"].Set(float64(j.Progress.PrintTimeLeft))
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}
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func getJob(hostname, apiKey string) (*JobV2, error) {
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r, err := http.NewRequest(http.MethodGet, hostname+"/api/job", nil)
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if err != nil {
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return &JobV2{}, err
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}
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r.Header.Set("X-Api-Key", apiKey)
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res, err := http.DefaultClient.Do(r)
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if err != nil {
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return &JobV2{}, err
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}
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b, err := io.ReadAll(res.Body)
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if err != nil {
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return &JobV2{}, err
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}
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j := &JobV2{}
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err = json.Unmarshal(b, j)
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if err != nil {
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return &JobV2{}, err
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}
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return j, nil
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}
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func getPrinter(hostname, apiKey string) (*MetricsV2, error) {
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r, err := http.NewRequest(http.MethodGet, hostname+"/api/printer", nil)
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if err != nil {
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return &MetricsV2{}, err
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}
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r.Header.Set("X-Api-Key", apiKey)
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res, err := http.DefaultClient.Do(r)
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if err != nil {
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return &MetricsV2{}, err
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}
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b, err := io.ReadAll(res.Body)
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if err != nil {
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return &MetricsV2{}, err
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}
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j := &MetricsV2{}
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err = json.Unmarshal(b, j)
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if err != nil {
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return &MetricsV2{}, err
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}
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return j, nil
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}
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func getTelemetry(hostname string) (*MetricsV1, error) {
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res, err := http.Get(hostname + "/api/telemetry")
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if err != nil {
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return &MetricsV1{}, err
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}
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b, err := io.ReadAll(res.Body)
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if err != nil {
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return &MetricsV1{}, err
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}
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t := &MetricsV1{}
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err = json.Unmarshal(b, t)
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if err != nil {
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return &MetricsV1{}, err
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}
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return t, nil
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}
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// taking a guess on proper parsing here...
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func parseDuration(d string) time.Duration {
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dur := 0
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@ -187,6 +337,8 @@ func main() {
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flag.StringVar(&port, "port", "2112", "Local port to export metrics on")
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var path string
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flag.StringVar(&path, "path", "metrics", "Local path to export metrics on")
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var apiKey string
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flag.StringVar(&apiKey, "apikey", "", "Prusa Connect API key (see Main Menu -> Settings -> Network on the printer)")
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flag.Parse()
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if queryInterval < 1 {
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@ -198,18 +350,13 @@ func main() {
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QueryInterval: queryInterval,
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Port: port,
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Path: path,
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APIKey: apiKey,
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}
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r := prometheus.NewRegistry()
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r.MustRegister(opsNozzle)
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r.MustRegister(opsBed)
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r.MustRegister(opsZPosition)
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r.MustRegister(opsPrintSpeed)
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r.MustRegister(opsFlowFactor)
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r.MustRegister(opsProgress)
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r.MustRegister(opsDuration)
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r.MustRegister(opsRemaining)
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for _, g := range gauges {
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r.MustRegister(g)
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}
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recordMetrics(context.Background(), config)
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log.Printf("starting exporter on :%v", config.Port)
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